Mapped Vs Unmapped VBOs

[kramer]

Hi guys,

I've recently gotten back into LWJGL after a hiatus of a couple of years, and after a day rewriting my stuff from version 0.4 to 0.97 was very happy to see that the combination of new version of Java, several new versions of LWJGL and some new hardware increased my old app's frame rate from 60 to 400!!

Anyway, I recoded it to use Vertex buffer objects if supported and got another 25% increase, now I am just using plain unmapped buffer objects... mainly because I've had trouble understanding the mapped examples I've seen.  But the question is, are mapped VBOs that much better?

Thanks,
Kramer

[Fool Running]

If I understand correctly, mapped VBOs are used for dynamic data. Basically the VBO gets mapped into main memory and the app can change that memory.  After the app is done it releases it and it gets mapped back in the graphics card.
That is, if I understand correctly  :roll:

[kramer]

Ahh, thanks.  That makes some sense